package com.demo.example.dp;

public class DifferentNumTree {
    public static void main(String[] args) {
        System.out.println(numTree(3));
    }
    public static int numTree(int n){
        int[] dp=new int[n+1];
        dp[0]=1;
        for(int i=1;i<=n;i++){
            for(int j=1;j<=i;j++){
                dp[i]+=dp[j-1]*dp[i-j];
            }
        }
        return dp[n];
    }
}
